Very sad day indeed.
As Technician for Bell Labs, I saw (felt) the Apollo-Soyuz launch from bleachers in front of the VAB, about 3 miles away.
Amazing machine designed by engineers using drawing boards and slide rules.
Years later we developed a biology payload that flew on Columbia which was tragically lost on re-entry.
https://mars.gmu.edu/jspui/bitstream...8/107_mpfe.pdf